| K8myar | Youtuber | 2002 |
| Ilya Kabakov | Soviet and American conceptua… | 1933 |
| Jon Kabat-Zinn | American academic | 1944 |
| Abbas Ka'bi | Iranian ayatollah | 1962 |
| Joseph Kabila | President of the Democratic R… | 1971 |
| Kabir | Indian mystic poet | 1440–1518 |
| Roch Marc Christian Kaboré | President of Burkina Faso | 1957 |
| Mark Kac | Polish-American mathematician | 1914–1984 |
| Sadik Kaceli | Albanian artist | 1914–2000 |
| John Lee Ka-chiu | Chief Executive-elect of Hong… | 1957 |
| Theodore Kaczynski | American domestic terrorist, … | 1942 |
| Lech Kaczyński | Polish politician, president … | 1949–2010 |
| Ismail Kadare | Albanian writer | 1936 |
| Mohsen Kadivar | Iranian philosopher | 1959 |
| Cynthia Kadohata | Japanese-American children's … | 1956 |
| Richard Kadrey | San Francisco-based novelist,… | 1957 |
| Ramzan Kadyrov | President of Chechnya, former… | 1976 |
| Pauline Kael | American film critic | 1919–2001 |
| Colin Kaepernick | American football quarterback | 1987 |
| Franz Kafka | author | 1883–1924 |
| Elena Kagan | Associate Justice of the Supr… | 1960 |
| Janet Kagan | Science fiction author | 1946–2008 |
| Robert Kagan | American political scientist | 1958 |
| Shelly Kagan | American philosopher | 1956 |
| Lazar Kaganovich | Soviet politician | 1893–1991 |
| Steve Kagen | American politician | 1949 |
| Meir Kahane | American/Israeli political ac… | 1932–1990 |
| Brewster Kahle | American computer engineer, f… | 1960 |
| Frida Kahlo | Mexican painter | 1907–1954 |
| Herman Kahn | American futurist | 1922–1983 |
| Madeline Kahn | American actress | 1942–1999 |
| Philippe Kahn | Entrepreneur, camera phone cr… | 1952 |
| Robert L. Kahn | American psychologist | 1918–2019 |
| Roger Kahn | American baseball writer | 1927–2020 |
| Daniel Kahneman | Israeli-American psychologist | 1934 |
| Ignatius Ayau Kaigama | Nigerian Catholic archbishop | 1958 |
| Uuno Kailas | Finnish poet and writer | 1901–1933 |
| David Kaiser | American physicist | 1971 |
| Henry J. Kaiser | American industrialist | 1882–1967 |
| Joachim Kaiser | German music critic | 1928–2017 |
| Robert G. Kaiser | American journalist | 1943 |
| Chiang Kai-shek | Chinese politician and milita… | 1887–1975 |
| Hiroshi Kajiyama | Japanese politician | 1955 |
| Subhash Kak | Indian computer scientist | 1947 |
| Dipika Kakar | Indian actress | 1986 |
| Hatake Kakashi | fictional character in the Na… | |
| Qutbuddin Bakhtiar Kaki | Indian Sufi | 1173–1235 |
| Kakiemon | Japanese potters family with … | |
| Michio Kaku | American theoretical physicis… | 1947 |
| Francis Y. Kalabat | American bishop | 1970 |
| A. P. J. Abdul Kalam | 11th President of India, scie… | 1931–2015 |
| Mikhail Kalashnikov | Soviet and Russian small arms… | 1919–2013 |
| Johann de Kalb | American general | 1721–1780 |
| Nicholas Kaldor | British/Hungarian economist | 1908–1986 |
| Roberta Kalechofsky | American activist | 1931 |
| Michał Kalecki | Polish economist | 1899–1970 |
| Kalhana | | |
| Richard Kalich | novelist | |
| Kālidāsa | Classical Sanskrit writer | |
| Mindy Kaling | actress, writer, comedian | 1979 |
| Mikhail Kalinin | Soviet politician | 1875–1946 |
| Jusuf Kalla | The tenth Vice President of t… | 1942 |
| Joseph Kallarangatt | Indian Syro-Malabar Catholic … | 1956 |
| Yrjö Kallinen | Finnish politician | 1886–1976 |
| Maira Kalman | Israeli American artist and c… | 1949 |
| Tibor Kalman | American graphic designer | 1949–1999 |
| Rudolf E. Kálmán | Hungarian-born American elect… | 1930–2016 |
| Tomas Kalnoky | American musician | 1980 |
| Daphne Kalotay | American writer | |
| Ernst Kaltenbrunner | Austrian-born senior official… | 1903–1946 |
| Dariusz Kałuża | Polish religious servant and … | 1967 |
| Chris Kamara | English association football … | 1957 |
| Jean Kambanda | Rwandan politician | 1955 |
| Nawab Waqar-ul-Mulk Kamboh | Politician for India's indepe… | 1841–1917 |
| Dean Kamen | American businessman | 1951 |
| Anna Kamieńska | Poet, writer and translator | 1920–1986 |
| Akimine Kamijyo | Japanese manga artist | 1975 |
| Wendy Kaminer | American lawyer | 1949 |
| Nico van Kampen | Dutch theoretical physicist | 1921–2013 |
| Ingvar Kamprad | Entrepreneur | 1926–2018 |
| Sepandar Kamvar | Iranian computer scientist | 1977 |
| Meena Kandasamy | Indian poet | 1984 |
| Eric R. Kandel | American neuropsychiatrist | 1929 |
| Muhammad Saad Kandhlawi | | 1965 |
| Wassily Kandinsky | Russian painter | 1866–1944 |
| Sukirti Kandpal | Indian actress | 1987 |
| Big Daddy Kane | American musician | 1968 |
| Bob Kane | American comic book artist, t… | 1915–1998 |
| Helen Kane | American actress | 1904–1966 |
| Pandurang Vaman Kane | Indian Indologist and Sanskri… | 1880–1972 |
| Sarah Kane | playwright from England | 1971–1999 |
| Danish Kaneria | Pakistani cricketer | 1980 |
| Han Kang | South Korean writer | 1970 |
| Song Kang-ho | South Korean actor | 1967 |
| Immanuel Kant | German philosopher | 1724–1804 |
| Enes Kanter | Turkish basketball player | 1992 |
| Rosabeth Moss Kanter | American economist | 1943 |
| Leonid Kantorovich | Russian mathematician | 1912–1986 |
| Charles K. Kao | Hong Hong-British-American ph… | 1933–2018 |
| William Kapell | American classical pianist | 1922–1953 |
